Hmm, I could see this happening if you have a different ECM definition file on each computer, one maybe being old or corrupted, but I've used TC for almost 10 years and if the file def caused the parms to be off, that would have really scewed up some people...so I guess that couldn't be the issue unless you have used the "custom tool"..I forget what its called to define some of your own tables in there...using the T31 def file right?